/Engine/Plugins/Editor/ContentBrowser/ContentBrowserAliasDataSoure/Source/ContentBrowserAliasDataSource/Public/ContentBrowserAliasDataSource.h
A unique alias is a pair of SourceObjectPath:AliasPath, eg /Game/MyAsset.MyAsset:/Game/SomeFolder/MyAlias
typedef TPair< [FSoftObjectPath](API\Runtime\CoreUObject\UObject\FSoftObjectPath), [FName](API\Runtime\Core\UObject\FName) > FContentBrowserUniqueAlias